Ground-anchor.



C. L. MATTHEWS.

GROUND ANCHOR.

APPLICATION FILED on. 31. m2.

Patented June 8, 1915.

v lm emor Claude L .Ma/ffiew ran srarns PATENT OFFIQE.

CLAUDE L. MATTHEWS, OF ST. LOUIS, MISSOURI, ASSIGNOR- T W. MATTHEWS AND BROTHER, A COPARTNERSHIP COMPRISING HIMSELF AND WM. N. MATTHEWS, OF

ST. LOUIS, MISSOURI.

To all whom, it may concern lowing is a full, clear, and exact description,

such as will enable others skilled inthe art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this speciiication, in which Figure l is a side elevational view of my improved ground anchor. Fig. 2 is a sectional view on line 22 of Fig. 1. Fig. 3 is a vertical sectional view. Fig. 4.- is a top plan view with the flukes extended to their anchoring position. Fig. 5 is a sectional view on line 55 of'Fig. 1. Fig. 6 is a side elevational view ofa modified form.

This invention relates to a new and useful. improvement in ground anchors, the object being to construct a simple and cheap device of the character described and one which can be buried in the ground and have its flukes forced outwardly so as to afford a greater amount-of resistance to the pull on the guy rope connected thereto.

Ground anchors of the character described are employed for various purposes, a common use being for the attachment of guy rope employed in connection with telegraph, telephone and lighting poles.

In the drawings, 1 indicates the guy rod which, in practice, is usually provided with an eye at its upper end, not shown, to which eye is connected the guy rope. The lower end of this rod is threaded to receive a nut 2.

3 indicates a casting, the base portion of which is preferably in the form of a hollow ring from which rises two walls 4 connected at their upper ends by a conical shaped boss 5 through which the guy rod 1 passes.

6 is a connecting rib between these walls formed by the seat for the nut 2 and with an opening through which passes the lower end of the guy rod 1. The purpose in thus providing a seat for the nut is to enable the guy rod to be unscrewed and detached from the anchor in the event that it is desired tono longer use the anchor. The side walls are separated by a slot 7 on each sideof which are grooves 8. v

9 are the plates or flukes of the anchor,

Specification of Letters Patent.

GROUND-ANCHOR.

Patented June 8, 1915 Application filed October 31, 1912. Serial No. 728,966.

the upper ends of which are slightly thickened, as at 10, to form hammering heads.

11 indicates a lug on the inner face of each fluke near its upper end which fits into the groove 7 and has a dovetailed relation thereto. The plates 10 are bilaterally symmetrical with respect to their lugs 11, and thus when said plates are properly mounted on the base they occupy'positions directly 0pposite to each other, and their side portions,

extend outwardly at equal distances from a line drawn through the center of the rod 1, and the centers of the slot 7. By virtue of this construction the strains resulting from the pull of the guy rope attached to the rod 1 are equalized throughout the anchor, and consequently uniformly transmitted to the earth in which the anchor is embedded. On each side of lug 11, the flukes are provided with ribs 12 which fit into the grooves 8 and guide the fiukes in their downward and outward movement.

In operation the parts are assembled as shown. in Fig. 1, the flukes being held intheir elevated position by means of a string 13. The hole to receive the anchor may be formed by an ordinary post hole digger to the required depth depending upon the purpose for which the anchor is to be used and the nature of the ground. The guy rod is assembled and the anchor lowered to the bottom of the hole. When at the bottom of the hole, a suitable implement, such as a tamping bar, is employed to drive in the flukes downwardly and outwardly by striking them upon their hammering, heads 10. The string 13, of course, will be quickly broken and permit the flakes to move from the position shown in Fig. 1 to the position shown in Fig. 3. The earth is tamped above the anchor and around the rod and the guy rope attached to the eye in the guy rod.

In order that the walls 4 may more efiectually resist the pull on the y rod, the same are preferably formed 0 a series .of steps 4, as shown in Fig. 5. These steps provide shoulders which engage the material tamped-on' and around the anchor and are particularly effective when broken stones I for slidingmovement on said curved faces,-

connected together and can be driven downpair of oppositely disposed curved faces in eaehof which is formed a vertically disposed dove-tailed slot, curved plate fiukes arranged and a dove-tailed lug on the rear face of each fluke, which lag is arranged for sliding movement inthe corresponding dovetailed groove, said base being provided with a pair of oppositely disposed curved faces between the first mentioned pair of curved faces, and the second mentioned pair of curved faces being provided with horizontally disposed shoulders. v

2. A. ground anchor comprising a base having a pair of oppositely disposed curved faces in each of which is formed a vertically disposed slot and a groove and a pair of fiulres arranged for sliding movement on said curved faces, each fluke being provided on its rear side with ribs which engage the corresponding slot/and groove.

3. A ground anchor comprising a base having a pair of oppositely disposed curved faces which are provided with horizontally disposed ribs or corrugations said base also having a pair of oppositely disposed vertically curved faces, eachof wh ch is pro- 'vided with a centrally arranged dove-tailed slot and a pair of adjacent grooves, acurved fluke arranged for sliding movement upon each curved face, a dove-tailed lug projecting rearwardly upon each flukethrough the corresponding slot, and ribs formed on the rear side of each fluke, which ribs engage in the grooves adjacent the slot.

4. A ground anchor comprising a base having apair of oppositely disposed curved faces WhlCh are provided with horizontallydisposed ribs or corrugations, said base also having a-pa1r of oppositely disposed vertically curved faces, each of which is provided with a centrally arranged dovetailed slot and a pairof adjacent grooves, a curved fluke arranged for sliding movement upon each curved face, a dove-tailed lug projecting rearwardly from each fluke through the corresponding slot, ribs formed on the rear side of each uke, which ribs engage in the grooves adjacent the slot, and hammering v CLAUDE L. MATTHEWS.

Witnesses:

M. P. SMITH,

C. Si BUTLER. 

